Pow(x, n)

power.py

def myPow(self, x: float, n: int) -> float:
        ans, power = 1, abs(n)       
                
        while power:
            if power % 2 == 0:
                x *= x
                power //= 2
            else:
                ans *= x
                power -= 1
        
            
        return (1/ans) if n<0 else ans